/* Tab-specific styles */
.tab-button {
    padding: 1rem 2rem;
    border: none;
    background: transparent;
    color: #9CA3AF;
    font-weight: 500;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-button.active {
    color: #3B82F6;
    border-bottom-color: #3B82F6;
}

.tab-button:hover {
    color: #60A5FA;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Form field groups */
.field-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.three-column-group {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1rem;
}

@media (max-width: 768px) {
    .field-group {
        grid-template-columns: 1fr;
    }
    
    .three-column-group {
        grid-template-columns: 1fr;
    }
}

/* Dropdown styles */
.custom-select {
    position: relative;
    display: inline-block;
    width: 100%;
}

.custom-select select {
    width: 100%;
    padding: 1rem;
    background-color: #374151;
    border: 1px solid #4B5563;
    border-radius: 0.5rem;
    color: white;
    font-size: 1rem;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
}

.custom-select::after {
    content: '▼';
    position: absolute;
    top: 50%;
    right: 1rem;
    transform: translateY(-50%);
    pointer-events: none;
    color: #9CA3AF;
}

.custom-select select:focus {
    outline: none;
    border-color: #3B82F6;
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.3);
}

/* Results section */
.results-section {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: 1rem;
    padding: 2rem;
    margin-top: 2rem;
}

.result-amount {
    font-size: 2.5rem;
    font-weight: 700;
    color: #10B981;
    margin-bottom: 0.5rem;
}

.result-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.result-item {
    background: rgba(255, 255, 255, 0.05);
    padding: 1rem;
    border-radius: 0.5rem;
    text-align: center;
}

.result-label {
    color: #9CA3AF;
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
}

.result-value {
    color: #FFFFFF;
    font-weight: 600;
    font-size: 1.125rem;
}

/* Interest rate link */
.interest-rate-link {
    color: #3B82F6;
    text-decoration: underline;
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: inline-block;
}

.interest-rate-link:hover {
    color: #60A5FA;
}

/* Hidden elements */
.hidden {
    display: none !important;
}

/* Loading spinner */
.loading-spinner {
    border: 2px solid #374151;
    border-top: 2px solid #3B82F6;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
    display: inline-block;
    margin-right: 0.5rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}